Journal of Materials Science

, Volume 21, Issue 10, pp 3581–3589 | Cite as

Determination of the activation energies for nucleation and growth of crystal nuclei in metallic glasses

  • Q. C. Wu
  • M. Harmelin
  • J. Bigot
  • G. Martin
Papers

Abstract

A mathematical procedure is proposed in order to determine separately the activation energy for nucleation,En, and for growth,Eg, from isothermal crystallization experiments on metallic glasses. Differential scanning calorimetry (DSC) is used in the isothermal mode to estimate the crystalline fraction as a function of time. The model deals only with polymorphic and eutectic growth. Cu60Zr40 amorphous alloys produced with different quenching rates are taken as an example for demonstrating the ability of the proposed method. It is shown that the number of pre-nuclei can be related to the conditions of the initial quench.

Keywords

Polymer Crystallization Activation Energy Differential Scanning Calorimetry Calorimetry 

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Copyright information

© Chapman and Hall Ltd 1986

Authors and Affiliations

  • Q. C. Wu
    • 1
  • M. Harmelin
    • 1
  • J. Bigot
    • 1
  • G. Martin
    • 1
  1. 1.CNRS, Centre d'Etudes de Chimie MétallurgiqueVitry-sur-Seine CedexFrance

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